岩性油气藏 ›› 2015, Vol. 27 ›› Issue (5): 183–188.doi: 10.3969/j.issn.1673-8926.2015.05.030

• 油气地质 • 上一篇    下一篇

辽中凹陷北部东二下亚段湖底扇沉积数值模拟及应用

魏洪涛   

  1. 中海石油(中国)有限公司天津分公司,天津 300452
  • 出版日期:2015-09-26 发布日期:2015-09-26
  • 作者简介:魏洪涛( 1969- ),男,硕士,工程师,主要从事科研管理及石油地质方面的研究工作。 地址:( 300452 )天津市塘沽区渤海石油路 688 号海洋石油大厦 A 座 405 室。 E-mail : weiht@cnooc.com.cn 。
  • 基金资助:

    “十二五”国家重大科技专项“近海隐蔽油气藏勘探技术”(编号: 2011ZX05023-002 )资助

Numerical simulation of sublacustrine fan deposition of lower Ed2 Formation and its application in northern Liaozhong Depression

Wei Hongtao   

  1. Tianjin Branch of CNOOC Ltd. , Tianjin 300452 , China
  • Online:2015-09-26 Published:2015-09-26

摘要:

渤海海域辽中凹陷北部东二下亚段发育湖底扇沉积,但其形成机制以及时空展布规律尚不明确。采用数值模拟技术,对湖底扇模拟期次进行划分,并制作相对湖平面变化曲线和可容纳空间变化模型,同时评估物源供应和搬运方式,获取相应的地质参数,对湖底扇的形成过程及时空展布进行了精细研究。模拟结果表明,研究区湖底扇主要发育在湖泛体系域内,受先期不稳定三角洲、较强的水动力条件以及沉积坡折带的共同作用而形成,具有双物源、多期次及规模大的特点。 以沉积模拟的结果为基础,结合宏观地震相以及地震属性分析,进行平面沉积相编图,为湖底扇储层精细描述和预测提供了可靠依据。

关键词: 构造演化, 沉积层序, 构造地貌, 层序叠置样式, 高柳地区, 南堡凹陷

Abstract:

Sublacustrine fan developed in lower Ed2 Formation in northern Liaozhong Depression of Bohai Bay, but its formation mechanism and space-time distribution rules were unclear. By the use of numerical simulation technology, deposition process and distribution of sublacustrine fan were studied based on the geological parameters including division period, relative lake level change curve and accommodate spatial change model, source supply and transport pattern. The simulation result shows that sublacustrine fan mainly developed in lake flooding system tract, it was formed by the together action of the early instability delta, strong hydrodynamic condition and sedimentary slope break belt, and it is characterized by multi period, double provenance and wide distribution features. Based on the simulation results, combined with macro seismic facies and seismic attributes analysis, plane sedimentary map was drawn, which provides favorable basis for fine reservoir description and prediction of sublacustrine fan.

Key words:  tectonic evolution, sedimentary sequence, tectonic geomorphology, stratigraphic superimposed style, Gaoliu area, Nanpu Sag

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